Switch with BJT or MOSFET in a R/C car project

lefam · Mar 11, 2011

Hi,

I am working in a R/C car project that consists in hacking the car's remote control to control it with a cellphone. I am using an arduino duemilanove board (with atmega328 MCU).
The idea is to send commands to the remote control using the arduino. In fact, what the arduino should do is close some switches in the remote control.

I am in doubt if I should switch using a BJT transistor or a MOSFET one.

I have seen on a website that the BJTs are better for amplifying, while the MOSFETs are good in switching.
Does it matter using one instead of the other? Or doesnt it matter?

Thank you!!!

(*steve*) · Mar 12, 2011

For small signal use (i.e. low current, low voltage) either will probably work.

BJT may have the advantage of not being static sensitive.

Switch with BJT or MOSFET in a R/C car project

lefam

(steve) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

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Switch with BJT or MOSFET in a R/C car project

(*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

(steve) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator